Low Power Adjustable UV and OV Monitor with 400 mV 0.275% Reference

The ADCMP671 voltage monitor consists of two low power, high accuracy comparators and reference circuits. It operates on a supply voltage from 1.7 V to 5.5 V and draws only 8.55 μA maximum, making it suitable for low power system monitoring and portable applications. The part is designed to monitor and report supply undervoltage and overvoltage fault. The low input bias current and voltage reference allows resistor adjustable UV and OV threshold down to 400 mV. The ADCMP671 has two open-drain outputs: the PWRGD output indicates that the supply is within the UV and OV window, and the OV output indicates that the supply is overvoltage. This output combination allows users to window monitor N supplies with an N + 1 processor input/output (I/O). Each output is guaranteed to sink greater than 5 mA over temperature.

The ADCMP671 is available in 6-lead TSOT package. The device operates over the -40°C to +125°C temperature range.

APPLICATIONS

* Supply voltage monitoring

* Li-ion monitoring

* Portable applications

* Handheld instruments

* Window monitoring with minimum processor I/O

* Internal hysteresis: 9.2 mV typical

* 400 mV ± 0.275% threshold at VDD = 3.3 V, 25°C

* Supply range: 1.7 V to 5.5 V

* Low quiescent current: 8.55 μA maximum

* Input range includes ground

* Open-drain outputs